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Finding the Fourth Proportional to 550.61, 759.71 and 476.80

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Solution

The fourth proportional to 550.61, 759.71 and 476.80 is: 657.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.61 : 759.71 = 476.80 : x
  2. Step 2: Convert to fraction form
    550.61/759.71 = 476.80/x
  3. Step 3: Cross multiply
    550.61x = 759.71 × 476.80
  4. Step 4: Simplify right side
    550.61x = 362,229.02
  5. Step 5: Solve for x
    x = 362,229.02/550.61
  6. Step 6: Final answer
    x = 657.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.